SLRS007C November   1986  – January 2015 SN754410

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Thermal Information
    4. 7.4 Electrical Characteristics
    5. 7.5 Switching Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 High Current, High Voltage Outputs
      2. 9.3.2 TTL Compatible Inputs
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Trademarks
    2. 13.2 Electrostatic Discharge Caution
    3. 13.3 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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9 Detailed Description

9.1 Overview

The SN754410 is a quadruple high-current half-H driver designed to provide bidirectional drive currents up to 1 A at voltages from 4.5 V to 36 V. The device is designed to drive inductive loads such as relays, solenoids, DC and bipolar stepping motors, as well as other high-current/high-voltage loads in positive-supply applications. All inputs are compatible with TTL and low-level CMOS logic. Each output (Y) is a complete totem-pole driver with a Darlington transistor sink and a pseudo-Darlington source. Drivers are enabled in pairs with drivers 1 and 2 enabled by 1,2EN and drivers 3 and 4 enabled by 3,4EN. When an enable input is high, the associated drivers are enabled and their outputs become active and in phase with their inputs. When the enable input is low, those drivers are disabled and their outputs are off and in a high-impedance state. With the proper data inputs, each pair of drivers form a full-H (or bridge) reversible drive suitable for solenoid or motor applications.

A separate supply voltage (VCC1) is provided for the logic input circuits to minimize device power dissipation. Supply voltage VCC2 is used for the output circuits. The SN754410 is designed for operation from −40°C to 85°C.

9.2 Functional Block Diagram

logsymbol_slrs007.gif
This symbol is in accordance with ANSI/IEEE Std 91-1984and IEC Publication 617-12.

9.3 Feature Description

9.3.1 High Current, High Voltage Outputs

Four high current and high voltage outputs feature clamp diodes for inductive load driving.

typ_out_slrs007.gifFigure 5. Typical of All Outputs

9.3.2 TTL Compatible Inputs

Data inputs and enable inputs are compatible with TTL. 3.3-V CMOS logic is also acceptable, however open or high impedance input voltage can approach VCC1 voltage.

eq_in_slrs007.gifFigure 6. Equivalent of Each Input

9.4 Device Functional Modes

Table 1. Function Table(1)

INPUTS(2) OUTPUTS
Y
A EN
H H H
L H L
X L Z
(1) H = high-level
L = low-level
X = irrelevant
Z = high-impedance (off)
(2) In the thermal shutdown mode, the output is in a high-impedance state regardless of the input levels.